[Amps] Time delay problem with an ALPHA 76 CAE (3tubes).

[Martin Sole (HS0ZED)]

I've previously had this same problem with such amplifiers. Culprit was 
always the capacitor associated with the timing circuit going leaky and 
preventing a full charge to switch the timer circuit.

Replace with a similarly rated electrolytic and the problem will most 
likely be resolved.

You can prove it first with a voltmeter across the capacitor to observe 
the charge, or rather lack of.

73
Martin, HS0ZED


On 13/12/2014 08:15, J.H Mauduit-Larive wrote:
> Hello,
>
> I have an Alpha 76CA #SN 6704 (October 1983). The amp has been stocked 
> for about 10 years! When I press the ON button , the panel meters 
> illuminate amber but do not change to pale green after 60/90s as 
> indicated. Blower starts, HV is normal : 1.5 KV but the meters do not 
> change to green indicating "ready to transmit". This looks like a 
> "time delay" problem. Do you have any suggestion to fix this trouble. 
> Living on Reunion island (Indian ocean) it's very complicated to ship 
> back the radio for repairing... Thanks in advance for your help. 
> Herik, FR5DX.
>
>
>
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